[MacDV] Re: Hard drive for iBook video editing

[Richard Brown]

I used a Firewire hub to combine a PD150 for monitoring and I/O with 
two 120GB Firewire drives in ADS Pyro Firewire Cases (with Oxford 911 
chips.) Rock solid for heavy, demanding DVCAM editing for weeks on end 
using FCP3. We never went past 8 video tracks and 8 audio tracks, 
however...

Richard Brown

On Monday, March 3, 2003, at 01:57 PM, Michael Winter wrote:

>
> On Monday, March 3, 2003, at 02:37  PM, Mark M. Florida wrote:
>
>> The problem with using FireWire drives for DV capture is not that the 
>> drives themselves or the FireWire interface aren't fast enough, it's 
>> that there's contention with the FireWire bus when transferring 
>> to/from a FireWire camera on the same bus -- both devices *want* 
>> control, but only one of them *gets* it.
>
> I've only tested having both the Firewire drive and the video source 
> on the same Firewire bus, but didn't have any trouble. The reason I 
> did this testing was based on an earlier thread on the list titled 
> "200 gig hard drive vs. dividing hard imac drive" in case anyone wants 
> to look it up in the archive.
>
> From that thread I found that "Real world firewire 400 is 27MB to 
> 35MB/sec., maybe 37MB/sec." and DV capture only requires 3.6 MB/sec 
> (courtesy of sb). Plenty of bandwidth for the job. It was also 
> indicated that having the hard drive and the video source 
> daisy-chained was not a problem, which my testing verified (to my 
> satisfaction).
>
> Now wether or not there may be other bottlenecks in the iBook that 
> cause problems, I don't know.
>
> -Mike